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Artist's Statement

The Porcelain Story
Porcelain was discovered as a ceramic material in China thousands of years ago. It was often referred to as white gold by the Europeans when it was first brought to the courts of kings. Porcelain is basically a mixture of kaolin, feldspar and silica that is free of other metallic impurities, especially iron. Porcelain can be fired to a very high temperatureó2400ļ F and above. This firing temperature is much higher than those of other clays such as earthenware or terra cotta. The high temperature causes the clay to vitrify and become very dense. Therefore, it is very strong and durable. This is not your mother's bone china, which is slip cast and fired to the same temperature as earthenware. Because it fires white, it provides a wonderful "canvas" for bright colors and/or transparent glazes. Glazes are a mixture of sand (silica), a feldspar to help it melt and an oxide to give it color. This mixture is applied to the surface of the pot and forms a glass when fired. Light passes through this glass and hits the porcelain beneath. The white color of the porcelain bounces the light back, and the colors grab your heart.

Why isnít all pottery porcelain?
Frankly, porcelain is just too hard for most potters to deal with. It is very hard to throw because it is not as plastic as other clays. Some people say it is like throwing with butter. It is very unforgiving during the drying and firing process. The drying process requires moderate temperature and humidity. If a pot is not well made, it will crack or even explode during the firing. It is not a clay for beginners. If you see a well-made porcelain vessel, you know it was made by a very experienced potter.

Reduction Firing
Earthenware, terra cotta and even some stoneware are fired in an electric kiln at temperatures ranging from 1800ļ F to 2000ļ F. The atmosphere in these kilns is the same as in the air around you because heat is caused by the electrical resistance in the wiring. They achieve color through the use of stains or stable oxides with a strong flux needed to melt the silica. Bright colors such as orange usually require a lead-based flux and are not practical for functional ware.

Reduction firing, on the other hand, requires a fuel-fed flame. At Silver Ridge we use propane. In order to achieve reduction, you add more fuel than the air in the kiln can burn efficiently. To keep the flame burning, oxygen molecules are pulled from the glaze. That is why it is called reduction: you are reducing the oxygen molecules on the oxides. This is what gives you copper red or opalescent titanium. In its normal state, copper is the color of a penny; when it is oxidized it turns green, and when an oxygen molecule is removed it turns red. Once this molecular change takes place, the color is there to stay and wonít ever fade. In addition, the melting temperatures of porcelain and the glaze are very close (around 2400ļ F) so that a bond is formed between the glaze and the porcelain. This is unlike other clays where the glaze sits on the surface.

As weíve seen from old Chinese vessels and todayís pieces from Silver Ridge, reduction firing produces a piece that is beautiful, functional and, if you donít drop it, timeless.

Handmade
All pots at Silver Ridge are individually thrown, trimmed, glazed and fired. Each piece is slightly different, reflecting the hand of the potter. It is much less expensive and takes very little skill to mold or jigger a pot. Each piece molded or jiggered is exactly the same as the next. Many are imported from Asia. Iíve been throwing for over 20 years, and my skills continue to improve. Each piece becomes a part of me as I form the clay on the wheel and add texture or trim a foot. Glazes used at Silver Ridge have been developed to give the best color and durability. There are no commercial glazes, decals or stamped decorations. If you are paying for handmade pottery, isnít that what you want?

Who is Lee Marshall?
Lee grew up in Louisville KY, went to Sacred Heart Academy and worked at Bremner Bisquit Co. while getting an AS in mechanical engineering. She later obtained a BS in engineering from Michigan State University and an MBA from Keller Graduate School in Chicago. She spent 30 years in "Corporate" as an engineer and executive in the pharmaceutical and medical device industries. During this time she discovered pottery making. She made so much pottery she didnít know what to do with it, so she did her first art fair. When someone gave her money for pots she couldnít give away to friends and family, it opened her eyes to many possibilities. In the 90ís, Lee realized that she could leave corporate America behind and devote her time to her passion of making pots. So she spent 2 years searching for property, designing the house and studio, and using her engineering skills to manage the building project. Six years ago, Lee established Silver Ridge Pottery on a 10-acre mountainside just off Chicken Road in the small community of Pulltight, Tennessee, about an hour east of Nashville. She now produces porcelain vessels which can be seen at galleries, gift shops and art fairs all over the United States.

 

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